How to remove Jdyi ransomware, Decrypt .jdyi files.

What is Jdyi file extension

.Jdyi file extension is a file extension that is associated with the newest version of widespread ransomware called STOP (Djvu). This malware was discovered by security researchers recently. Upon infecting a computer, it encrypts files on the computer, renames the affected files, adding .Jdyi extension at the end of their filenames, and demands a ransom for a key that will allow the computer owner to decrypt the files. Fortunately, there is a free Jdyi File Decrypt Tool called ‘STOP (Djvu) Decryptor’ that helps in some cases to decrypt encrypted files. Scroll through this article below to learn more about this decrypt tool and how to use it, as well as alternative ways to recover the contents of encrypted files.

What is Jdyi ransomware virus

First discovered recently, Jdyi ransomware is the newest version of STOP ransomware. Ransomware is a type of malware that encrypts files on the victim’s computer and demands a ransom payment to restore access to the contents of these files. Jdyi targets users running Microsoft Windows. In most cases, this malware requires user actions in order to be installed on the computer. Typically, criminals use various tricks, for example, disguising the malicious software as a freeware, cracks, activators and key generators, so that victims download and run Jdyi virus on their computer.

Upon infecting a computer, it performs the following steps as part of its preparation for encrypting files: creates a folder in the Windows system directory and copies itself to it; adds itself to the list of programs that start up every time the computer is turned on; collects information about the victim’s computer; establishes connection with its command server (C&C).

If the Jdyi ransomware was able to establish a connection with the C&C server, then it sends some information about the victim’s computer to the server, and the server returns a key to it that must be used to encrypt files. Such a key is called ‘online key’ and it is unique for each case of ransomware infection. If a connection to the C&C server has not been established, the ransomware uses a fixed key (so called ‘offline key’), which is unique for each version of STOP (djvu) ransomware, but the same for each case of Jdyi infection.

Having determined which key to use, the Jdyi ransomware virus goes to the main thing – it starts the file encryption process. Of course, it does not encrypt absolutely all files, since encryption of the Windows system files will cause the computer to stop working. Therefore, the ransomware does not encrypt files located in the system directory of Windows, as well as files with the following extensions: ‘.sys, .dll, .lnk, .ini, .bat’. In addition, Jdyi virus does not encrypt files named ‘_readme.txt’. All other files will become the target of the malware, for example, the following file types can be encrypted:

.bc6, .srw, .ltx, .z, .litemod, .gho, .mpqge, .accdb, .m2, .epk, .x3f, .hvpl, .wdp, .dcr, .der, .wps, .ibank, .rofl, .dazip, .cfr, .vfs0, .cer, .wma, .m3u, .fos, .hkx, .rtf, .odm, .xmmap, .wpt, .ptx, .iwd, .crt, .xbdoc, .dng, .xbplate, .wbd, .3fr, .srf, .bkf, .rwl, .wps, .cr2, .svg, .xlsx, wallet, .z3d, .ai, .raf, .wmo, .indd, .pem, .rar, .x3f, .jpeg, .vpk, .wpl, .psd, .bay, .wpb, .lvl, .odc, .sql, .xlsx, .yml, .lbf, .doc, .apk, .zdc, .wbk, .xdl, .mdb, .xmind, .zip, .map, .wpd, .dxg, .hkdb, .qic, .cas, .blob, .ysp, .xlsm, .wp4, .vtf, .ztmp, .pptm, .js, .xls, .nrw, .wpa, .xf, .wri, .x, .pst, .jpg, .xls, .icxs, .xx, .p7c, .zw, .sidd, .x3d, .wsh, .1, .sav, .yal, .snx, .m4a, .mddata, .xy3, .rim, .mlx, .orf, .itdb, .webdoc, .mdf, .wot, .ws, .wpg, .itm, .raw, .w3x, .esm, .sidn, .wp, .kf, .mrwref, .desc, .rb, .tax, .xlsb, .sis, .xld, .mp4, .odp, .wb2, .docm, .wbm, .xxx, .flv, .css, .eps, .forge, .iwi, .bkp, .crw, .sr2, .xpm, .gdb, .asset, .vpp_pc, .wbz, .y, .wpd, .erf, .kdc, .pdf, .t13, .menu, .pef, .bar, .pak, .layout, .zif, .fsh, .r3d, .zi, .zip, .qdf, .2bp, .cdr, .psk, .slm, .rw2, .wsc, .bc7, .docx, .xyw, .wpe, .fpk, .wmv, .db0, .vcf, .pptx, .png, .xyp, .wm, .das, .wmd, .wav, .lrf, .1st, .wmv, .xdb, .wbmp, .mov, .wp6, .ntl, .sum, .rgss3a, .d3dbsp, .dmp, .xlk, .p12, .xml, .t12, .ff, .dwg, .dbf, .mef, .7z, .bik, .webp, .xwp, .mcmeta, .ods, .zdb, .pfx, .vdf, .wdb, .wma, .ybk, .syncdb, .wgz, .odt, .wp5

All encrypted files become completely useless, their contents cannot be read in any way. To clearly show that the files are encrypted, the ransomware virus appends a new ‘.jdyi’ extension at the end of the filename of each encrypted file. This means the following: if the file had the name ‘photo-image.jpg’, then after it has been encrypted, it will be called ‘photo-image.jpg.jdyi’. In all directories where there are encrypted files, the Jdyi virus drops a file named ‘_readme.txt’

This file contains text written by the Jdyi authors. In this message, the criminals report that the user’s files were encrypted and the only way to get them back is to purchase a key and a decryptor. Attackers give the victim 72 hours. At this time, the key will cost $490, after 72 hours the ransom will increase to $980. The message also contains the contact information of the criminals, using which the victim can check the ability of the attackers to decrypt .jdyi files, as well as find out where to send the ransom.

The full text of the Jdyi ransomnote:

ATTENTION!

Don’t worry, you can return all your files!
All your files like photos, databases, documents and other important are encrypted with strongest encryption and unique key.
The only method of recovering files is to purchase decrypt tool and unique key for you.
This software will decrypt all your encrypted files.
What guarantees you have?
You can send one of your encrypted file from your PC and we decrypt it for free.
But we can decrypt only 1 file for free. File must not contain valuable information.
You can get and look video overview decrypt tool:
https://we.tl/t-5fdKAsZLIP
Price of private key and decrypt software is $980.
Discount 50% available if you contact us first 72 hours, that’s price for you is $490.
Please note that you’ll never restore your data without payment.
Check your e-mail “Spam” or “Junk” folder if you don’t get answer more than 6 hours.

To get this software you need write on our e-mail:
helpmanager@mail.ch

Reserve e-mail address to contact us:
restoremanager@airmail.cc

Your personal ID:

Threat Summary

Name	Jdyi ransomware, Jdyi file virus
Type	Filecoder, Crypto virus, File locker, Ransomware, Crypto malware
Encrypted files extension	.jdyi
Ransom note	_readme.txt
Contact	helpmanager@mail.ch, restoremanager@airmail.cc
Ransom amount	$980/$490 in Bitcoins
Detection Names	Win32:Trojan-gen, TR/Crypt.Agent.kenfl, W32/Kryptik.BZM.gen!Eldorado, W32/Kryptik.EVFO!tr, Trojan.Win32.Glupteba, BehavesLike.Win32.Generic.bc, HEUR:Exploit.Win32.Shellcode.gen, Trojan.Win32.Generic!BT
Symptoms	Encrypted personal files. Windows Explorer displays a blank icon for the file type. Your file directories contain a ‘ransom note’ file that is usually a .html, .jpg or .txt file. Desktop wallpaper is changed to the ransom note.
Distribution methods	Phishing Emails that is carefully designed to trick a victim into opening an attachment or clicking on a link that contains a harmful file. Malicious downloads that happen without a user’s knowledge when they visit a compromised webpage. Social media posts (they can be used to entice users to download malicious software with a built-in ransomware downloader or click a malicious link). Torrent webpages.
Removal	Jdyi ransomware removal guide
Decryption	Jdyi File Decrypt Tool

 

In file ‘_readme.txt’, criminals scare victims by saying that encrypted files cannot be decrypted without paying a ransom. And unfortunately this is true, the contents of the files cannot be read while the files are encrypted, and a key and decryptor are needed to decrypt them.

Fortunately, there is a free Jdyi File Decrypt Tool. This decryptor can help each victim to decrypt .jdyi files for free. But in addition to the decryptor, the key is still necessary. As we reported above, the virus can use two types of keys. An offline key can be determined by researchers, but only criminals have an online key. Thus, files encrypted with so called ‘offline key’ can be decrypted. And all files that have been encrypted with so called ‘online key’ cannot yet be decrypted. In this case, the alternative methods listed below in this article can be used to recover the contents of these files.

How to remove Jdyi ransomware and Descrypt (recover) .jdyi files

If your documents, the files of your friends or colleagues, were encrypted by the Jdyi ransomware virus, then you need to follow the steps listed below that will allow you to find and remove Jdyi, as well as decrypt or restore the encrypted files. It is very important to read the entire instruction manual carefully and make sure to understand it all. We advise you not to skip any steps, each of the steps is very important and must be completed by you. In order not to get confused and not miss an important point in the instructions, we recommend that you print this article or open it on your smartphone.

1. How to remove Jdyi ransomware
2. How to decrypt .jdyi files
3. How to restore .jdyi files
4. How to protect your PC from Jdyi ransomware

How to remove Jdyi ransomware

Before you start decrypting or recovering .jdyi files, you need to remove the Jdyi autostart entries. This must be done since otherwise the ransomware may re-encrypt the restored files. You can stop the ransomware from working, as it is not difficult to do. Another option is to perform a full system scan using free malware removal tools capable of detecting and removing ransomware infection.

It is very important to scan the computer for malware, as security researchers found that spyware could be installed on the infected computer along with the Jdyi ransomware. Spyware is a very dangerous security threat as it is designed to steal the user’s personal information such as passwords, logins, contact details, etc. If you have any difficulty removing the Jdyi virus, then let us know in the comments, we will try to help you.

To remove Jdyi ransomware, follow the steps below:

1. Kill Jdyi ransomware
2. Disable Jdyi ransomware Start-Up
3. Delete Jdyi ransomware Task
4. Delete Jdyi virus file
5. Scan computer for malware

Kill Jdyi ransomware

Press CTRL, ALT, DEL keys together.

Click Task Manager. Select the “Processes” tab, look for something suspicious that is the Jdyi ransomware then right-click it and select “End Task” or “End Process” option. If your Task Manager does not open or the Windows reports “Task manager has been disabled by your administrator”, then follow the guide: How to Fix Task manager has been disabled by your administrator.

It is not difficult to detect a process related to the Jdyi ransomware. When looking for a malicious process, pay attention to the process icon and its name. Most often, this ransomware has a process name in the following format: 4-characters.tmp.exe or 4-characters.exe. For example: 7533.tmp.exe, A4b1.exe, CD15.tmp.exe, 19b2.exe. If you do not find a process with a similar name in the list of processes, then most likely the Jdyi ransomware has finished working. But keep in mind, if you do not remove the ransomware autostart entries, as demonstrated below, and do not delete its file, then after a while it may start again, and if it finds unencrypted files, immediately encrypt them.

Disable Jdyi ransomware Start-Up

Select the “Start-Up” tab, look for something similar to the one shown in the example below, right click to it and select Disable.

Close Task Manager.

Delete Jdyi ransomware Task

Type “Task Scheduler” in the search bar. Click Task Scheduler app in the search results. Click “Task Scheduler Library” in the left panel. On the right panel, right-click to “Time Trigger Task” and select Delete.

Close Task Scheduler.

Delete Jdyi virus file

Run Task Manager and select the “Start-Up” tab. Right click to the Jdyi ransomware Start-Up entry and select Open File Location as shown below.

A directory containing one file will open in front of you, this file is the Jdyi ransomware. It needs to be removed. If you try to delete it immediately, then you will not succeed, since this file is protected from deletion.

To delete this file, you need to do the following. Right-click on the file, select Properties. In the window that opens, select Security tab. Next, click the Advanced button below. A window will open as shown in the following example.

Click Disable inheritance. In the Block inheritance dialog box that opens, select the first item (Convert inherited permissions…) as shown below.

In the Permission entries list, select “Deny Everyone”, click Remove button and then OK. Close the file properties window. You should now be able to remove the Jdyi ransomware File. Right-click on the file and select Delete.

Scan computer for malware

Zemana is highly recommended, because it can detect security threats such as ransomware, other malicious software and trojans which most ‘classic’ antivirus software fail to pick up on. Moreover, if you have any Jdyi removal problems which cannot be fixed by this tool automatically, then Zemana Free provides 24X7 online assistance from the highly experienced support staff.

Installing the Zemana Free is simple. First you’ll need to download Zemana Free on your personal computer from the link below.

When the download is finished, launch it and follow the prompts. Once installed, the Zemana AntiMalware will try to update itself and when this procedure is complete, click the “Scan” button for scanning your computer for the Jdyi ransomware virus, other malicious software, worms and trojans.

A system scan can take anywhere from 5 to 30 minutes, depending on your device. While the Zemana Free application is checking, you can see number of objects it has identified as threat. Review the scan results and then press “Next” button.

The Zemana will delete Jdyi ransomware, other kinds of potential threats like malware and trojans and move the selected items to the Quarantine.

In order to be 100% sure that the computer no longer has the Jdyi ransomware virus, we recommend using the Kaspersky virus removal tool (KVRT). This utility, as its name suggests, is designed by the Kaspersky lab and uses the core of the Kaspersky Antivirus. Unlike the Kaspersky Antivirus, KVRT has a smaller size and, most importantly, it can work together with an already installed antivirus software. This utility has great capabilities and therefore we recommend using KVRT in the last turn to be sure that the Jdyi crypto malware has been removed.

Download Kaspersky virus removal tool (KVRT) on your computer by clicking on the link below.

After downloading is finished, double-click on the Kaspersky virus removal tool icon. Once initialization procedure is complete, you’ll see the KVRT screen like below.

Click Change Parameters and set a check near all your drives. Click OK to close the Parameters window. Next click Start scan button to perform a system scan for the Jdyi ransomware . A scan can take anywhere from 10 to 30 minutes, depending on the count of files on your device and the speed of your computer.

After that process is complete, you may check all threats found on your PC system like below.

Review the results once the utility has done the system scan. If you think an entry should not be quarantined, then uncheck it. Otherwise, simply press on Continue to begin a cleaning task.

How to decrypt .jdyi files

Files with the extension ‘.jdyi’ are encrypted files. The ransomware uses a long key and a strong encryption algorithm, so it is impossible to decrypt files without a key and decryptor. Criminals demand a ransom for the key and the decryptor. Of course, even paying a ransom, there is no guarantee that victims will receive the required key and decryptor. Fortunately, a team of experts from Emsisoft created a decryptor that helps everyone to decrypt the encrypted files for free.

To decrypt .jdyi files, use Jdyi File Decrypt tool:

• Go to the following link to download Jdyi File Decrypt tool.
  STOP Djvu decryptor
• Scroll down to ‘New Djvu ransomware’ section.
• Click the download link and save the ‘decrypt_STOPDjvu.exe’ file to your desktop.
• Run decrypt_STOPDjvu.exe, read the license terms and instructions.
• On the ‘Decryptor’ tab, using the ‘Add a folder’ button, add the directory or disk where the encrypted files are located.
• Click the ‘Decrypt’ button.

Jdyi File Decrypt Tool is a free software that can decrypt the encrypted files only in some cases, when the files were encrypted with an ‘offline key’. If the files were encrypted with an ‘online key’, then they cannot be decrypted. The reason for this is that the decryption key is in the hands of criminals and this key can not be determined. This does not mean that if your files are encrypted with an online key, then their contents are lost forever. Fortunately, there are several ways to recover encrypted files. These methods do not involve the use of decryption and therefore can be used in any case, no matter what key the ransomware used to encrypt files.

How to find out which key was used to encrypt files

Since Jdyi File Decrypt Tool only decrypts files encrypted with an offline key, each Jdyi’s victim needs to find out which key was used to encrypt the files. Determining the type of key used is not difficult. Below we give two ways. Use any of them.

Find out the type of key using ‘_readme.txt’ file

• Open the ransom demand message (‘_readme.txt’ file).
• Scroll down to the end of the file.
• There you will see a line with the text ‘Your personal ID’.
• Below is a line of characters that starts with ‘0261’ – this is your personal id.

Find out the type of key using ‘PersonalID.txt’ file

• Open disk C.
• Open directory ‘SystemID’.
• Open file named ‘PersonalID.txt’. This file lists ‘Personal ID’s that match the keys that the virus used to encrypt files.

The ‘Personal ID’ is not a key, it is an identifier related to a key that was used to encrypt files. If the ID ends with ‘t1’, then the files are encrypted with an offline key. If the ID does not end with ‘t1’, Jdyi virus used an online key. If you could not figure out how to determine which key was used to encrypt files, then we can help. Just write a request here or in the comments below.

Jdyi File Decrypt Tool : “No key for New Variant online ID”

If, when you try to decrypt .jdyi files, Jdyi File Decrypt Tool reports:

No key for New Variant online ID: *
Notice: this ID appears to be an online ID, decryption is impossible

It means that your files are encrypted with an ‘online key’ and their decryption is impossible, since only the Jdyi authors have the key necessary for decryption. In this case, you need to use alternative methods listed below to restore the contents of encrypted files.

Jdyi File Decrypt Tool : “No key for New Variant offline ID”

If, during decryption of .jdyi files, Jdyi File Decrypt Tool reports:

No key for New Variant offline ID: *t1
Notice: this ID appears be an offline ID, decryption MAY be possible in the future.

It means the following: your files are encrypted with an ‘offline key’, but the key itself has not yet been obtained by security researchers, in this case, you need to be patient and wait a while, in addition, you can also use alternative ways for recovering encrypted data.

If for some reason you were unable to decrypt the encrypted files, then We recommend to follow the news on our Facebook or YouTube channels. So you ‘ll know right away that it ‘s possible to decrypt .jdyi files.

This video step-by-step guide will demonstrate How to use STOP Djvu decryptor to decrypt encrypted files.

How to restore .jdyi files

If the Jdyi File Decrypt tool cannot decrypt the encrypted files or your data is encrypted with an online key, then there is no need to despair. Fortunately, there are several alternative methods that can allow everyone to recover the contents of encrypted files. Each of these methods does not involve the use of special knowledge and paid programs and can be performed by everyone. We have prepared an instruction with illustrations, which describes in detail the process of data recovery. Before you begin data recovery, if you have not completed step 1, then go back. You must be 100% sure that the Jdyi ransomware virus is completely removed. We recommend using free malware removal tools.

Run ShadowExplorer to recover .jdyi files

The first and very simple way to restore encrypted files to the state in which they were before encryption is to restore files from their Shadow Copies. The Shadow Volume Copies are copies of files and folders that Windows automatically saved as part of system protection. This feature is fantastic at rescuing personal files that were locked by the Jdyi ransomware. The guide below will give you all the details.

Click the following link to download the latest version of ShadowExplorer for MS Windows. Save it on your Microsoft Windows desktop.

Once downloading is complete, open a directory in which you saved it. Right click to ShadowExplorer-0.9-portable and select Extract all. Follow the prompts. Next please open the ShadowExplorerPortable folder as shown on the screen below.

Double click ShadowExplorerPortable to launch it. You will see the a window like below.

In top left corner, choose a Drive where encrypted personal files are stored and a latest restore point similar to the one below (1 – drive, 2 – restore point).

On right panel look for a file that you want to restore, right click to it and select Export as on the image below.

This video step-by-step guide will demonstrate How to recover encrypted files using Shadow Explorer.

Run PhotoRec to recover .jdyi files

Another way to recover encrypted files is to use data recovery programs. There are many such programs, but most of them are paid. We recommend using a program called PhotoRec. It has all the necessary functions and is completely free.

Download PhotoRec by clicking on the following link.

After the downloading process is complete, open a directory in which you saved it. Right click to testdisk-7.0.win and select Extract all. Follow the prompts. Next please open the testdisk-7.0 folder as shown below.

Double click on qphotorec_win to run PhotoRec for MS Windows. It will show a screen as displayed on the screen below.

Select a drive to recover as displayed on the screen below.

You will see a list of available partitions. Choose a partition that holds encrypted documents, photos and music as displayed below.

Press File Formats button and choose file types to restore. You can to enable or disable the recovery of certain file types. When this is finished, click OK button.

Next, press Browse button to choose where recovered personal files should be written, then click Search. We strongly recommend that you save the recovered files to an external drive.

Count of recovered files is updated in real time. All recovered documents, photos and music are written in a folder that you have chosen on the previous step. You can to access the files even if the restore process is not finished.

When the recovery is done, click on Quit button. Next, open the directory where restored files are stored. You will see a contents as displayed in the following example.

All restored photos, documents and music are written in recup_dir.1, recup_dir.2 … sub-directories. If you are searching for a specific file, then you can to sort your restored files by extension and/or date/time.

This video step-by-step guide will demonstrate How to recover encrypted files using PhotoRec.

How to protect your PC from Jdyi ransomware

Most antivirus applications already have built-in protection system against the crypto malware. Therefore, if your PC does not have an antivirus program, make sure you install it. As an extra protection, use the HitmanPro.Alert. HitmanPro.Alert is a small security tool. It can check the system integrity and alerts you when critical system functions are affected by malware. HitmanPro.Alert can detect, remove, and reverse ransomware effects.

Download HitmanPro Alert by clicking on the following link.

When the download is done, open the file location. You will see an icon like below.

Double click the HitmanPro Alert desktop icon. Once the tool is started, you will be shown a window where you can choose a level of protection, as displayed in the figure below.

Now click the Install button to activate the protection.

To sum up

This article was created to help all victims of the Jdyi ransomware virus. We tried to give answers to the following questions: how to remove ransomware; how to decrypt .jdyi files; how to recover files, if the Jdyi File Decrypt Tool does not help; what is an online key and what is an offline key. We hope that the information presented in this article has helped you.

If you have questions, then write to us, leaving a comment below. If you need more help with Jdyi ransomware related issues, go to here.